Excavating dipper



W. M. BAGER EXCAVATING DIPPER Original Filed April 26, 1954 May 26,1936.

y Alforneys;

'Re'iuued May 26, 1936 a EXCAVATING DIPPER.

' William M. Bagel, Fox Point, Wilt, asalgnor to Bucyrus-Erle Company.

South Milwaukee,

Wis., a corporation of Delaware Original No. 2,018,628, dated October22, 1935, SerlaiNo. 722,424, April 26, 1934. Application for reissueNovember 16; 1935, Serial No; 50,401

11 Claims.

My invention relates to new and useful im-" provements in excavatingdippers, and more particularly to that type of excavating dipper whichis mounted on the end of a handle or handles carried by a power shovel.The shovel possesses mechanism for imparting both swinging ,andthrusting movements to the handle or handles, and hence to the dipper.

The main body of such a dipper is normally of a substantially cubicalform, open at the top and bottom. The handles are aihxed' to one side ofthe dipper, called the "back. The opposite side of the dipper, calledthe "front, carries at its upper edge a digging lip and/or a row of diging teeth.

The bottom opening of the dipper is closed by a door, hinged at the backof the dipper, and latched at the front.

It is the principal object of my invention to improve the constructionof this door, and of the cooperating parts of the dipper proper.

In order for the door to swing clear of the lower opening of the dipper,it is necessary for the hinges to be pivoted well up on the back of thedipper, but this introduces two objectionable features, namely: (1) thehinge is weakened by the necessity of having a long portion. of thehinge extending from its pivot to its point 0! attachment to the door;and (2) this long portion interferes ,with' the dipper handle and dipperhandle end casting when the debt swings open.

Furthermore I have found that, with the use of the conventional flatdoor in digging in sticky material, the door on opening merely breaksaway from the bottom of the sticky material without dislodging'thematerial from the dipper proper; whereas, if the door he built up tocontain some of the material, the exit of the material is started by.the opening of the door. And the provision of side walls on the doorserves to direct and concentrate the fall of the material, instead ofpermitting it to scatter.

- However, if these side walls Join the bottom of the doorat an abruptangle and/or ii' they extend clear to the open end of the door, theyimpede the dumping. Still furthermore, I have found that, for gradingwork, it is important to eliminate a substantial portion of the lowerrear corner edge of the dipper, for the two purposes of'eliminating'deadspace and of permitting the drawing back of the dipperclose to the boom to start a grading cut.

7 With these eonsiderationsin mind, it is my object to attain theabove-described advantages,

while avoiding the above-described disadvantages In addition to myprincipal object, ,1 have worked out a number of novel and usefuldetails,

- which one embodiment is exemplified in the accompanying drawing, whichis hereinafter particularly described and explained.

Throughout the description, the same reference number is applied to thesame member or to similar members.

Figure 1 is a plan view of the door of my dipper, showing in section therear portion of the hinges and the latch-keeper on the dipper proper.This view is taken along the line |--l of Figure 3.

Figure 2 is a lateral vertical section, taken along the line 2-2 ofFigure 1.

Figure 3 is a longitudinal vertical section, taken along the line 33 ofFigure 1.

Referring to the drawing, it will'be seen that H is the main body of thedipper proper. The

dipper proper carries, on its back, lugs ii (of portion of the hingeslying to the rear of the door, is much shorter than in the conventionalconstruction of the prior art.

The door ,carries the conventional latch l8, and the dipper propercarries the conventional latch-keeper l9, both of which may be of anywell-known form.

The door may be provided with stiffening ribs 20; but, by virtue of theshape of the door, these m y be smaller and fewer than would otherwiseberequired. 2

Having now described and illustrated one form of my invention, I wish itto be understood that my invention is not to be limited to the specificform or arrangement of parts hereinbefore described, exceptdnsofar assuch limitations are specified in the appended. claims.

I claim: 1

1. In an excavating dipper, the combination of: a main body, having aback, two sides and a s5 front, the bottom edges of the sides slopingupwardly from front to rear; a bottom door, having a substantially flatbottom portion, a back portiontangent thereto and curving graduallyupwardly therefrom, and side portions tangent to 1' therefrom, said sideportions being less and less high as they approach the front of thedoor; combined hinges and stiffening ribs, extending beneath a portionof the bottom of the door; and pivots for the hinges, carried by theback of the main body closely adjacent the juncture of this back withthe back of the door.

2. In an excavating dipper, the combination of g a main body, having aback, two sides and a front, the bottom edges of the sides slopingupwardly from front to rear; a bottom door, having a bottom portionsubstantially perpendicular to the front of the main body, a backportion curving gradually upwardly from the bottom portion, andside'portions curving gradually upward- I 1y from the bottom portion,said side portions being less and less high as they approach the frontof the door; hinges extending beneath a portion of the bottom of thedoor; and pivots for the hinges, carried by the back of the main bodyclosely adjacent the juncture of this back with the back of the door.

3. In an excavating dipper, the combination of a main body, having aback, two sides and a front, the bottom edges of the sides slopingupwardly from front to rear; a bottom door, having a bottom portion, aback portion sloping gently upwardly from the bottom portion, so as toeliminate a substantial part of the lower rear door, and pivots'for thehinges, carried by the back of the main body closely adjacent thejuncture of this back with the back of the door.

4. In an excavating dipper, the combination of: a main body, havingaback, two sides and a front, the bottom edges of the sides slopingupwardly from front to rear; a bottom door, having a substantially flatbottom portion substantially perpendicular to the front of the mainbody, and having back and side portions curving upwardly to meet theback and sides of the main body; combined hinges and stiffening ribs,extending beneath a portion of the bottom of the door; and pivots forthe hinges, carried by the back of the main body closely adjacent thejuncture of this back with the back of the door.

5. In an excavating dipper, the combination of: a main body, having aback, two sides and a front, the bottom edges of the sides slopingupwardly from front to rear; a bottom door, having a bottom portionsubstantially perpendicular to the front of the main body, and havingback and side portions curving upwardly to meet the back and sides ofthe main body; hinges, extending beneath a portion of the bottom of thedoor;.

from the outside, and having its side edges so portion of the bottom ofthe door; and pivots for the hinges, carried by the back of the mainbody closely adjacent the juncture of this back with the back of thedoor.

7. In an excavating dipper, the combination of:

a main body, having a back, two sides and a front, V

the bottom edges of the sides sloping upwardly from front to rear; abottom door having its rear portion sloping gently upwardly with respectto its forward portion, so as to eliminate a substantial part of thelower rear comer, of the dipper and having its side edges so sloped asto register with the edges of the sides of the main body; hinges,extending beneath a portion of the bottom of the door; and pivots forthe hinges, car- 'ried by the back of the main body, closely adjacentthe juncture of this back with the back of the door. l

8. As a separate article of manufacture, a door for an excavatingdipper, having: a bottom portion; a back portion, curving graduallyupwardly from the bottom'portion; side portions, curving graduallyupwardly from the bottom portion, said side portions being less and lesshigh as they approach the front of the door; and hinges, extendingbeneath a portion of the bottom of the door, said hinges having theirpivot points closely adjacent the upper edge of the rear portion of thedoor; the door being so' shaped, and the hingepivots sopositioned thatthe edges of juncture of the door to the dipper to which it is appliedwill slope upwardly from front to rear.

9. As a separate article of manufacture, adoor for an-excavatingdipperhaving: a bottom portion; a back portion, sloping gently upwardly from.

the bottom portion so as to eliminate a substanof the bottom. of thedoor, said hinges having their pivot points closelyadjacent the upperedge of the rear portion of the door, the door being so shaped and thehinge-pivots so positioned that the edges of the juncture of the door tothe dipper to which it is applied will-slope upwardly from front torear. 10. As a separate article of manufacture, a bottom dump door foran excavating dipper, having its rear portion sloping gently upwardlywith respect to its forward portion, so as to eliminate a substantialpart of the lower rear corner of the dipper, and having hinges extendingbeneath a portion of the bottom of the door, said ,hinges having theirpivot points closely adjacent the upper edge of the rear portion of thedoor; the door being so shaped, and the hinge-pivots so positioned, thatthe edges of the juncture of the door to the dipper to which it' isapplied will slope upwardly from front to rear. I

11. As a separate article of manufacture, a bottom dump door for anexcavating dipper, having its rear portion sloping gently upwardly withrespect to its forward portion, so as to eliminate a substantial part ofthe lower rear corner of the dipper, and having hinges conforming to therear portion of the door, said hinges having their pivot points closelyadjacent the upper edge of the rear portion of the door; the door beingso shaped, and the hinge-pivots so positioned, that the edges of thejuncture of the door to the dipper to which it is applied will slopeupwardly from front to rear.

